Earth's atmosphere is commonly referred to as possessing a three-cell
meridional structure in each hemisphere [1]}, which
can be recognized in the zonal-averaged velocities. Circulation cells
of such nature are thought to prevail in the atmospheres of terrestrial
planets [2]} and were observed, for example, on Mars
[3]} and Venus [4]}. On the terrestrial
planets, the solid surface drag plays a part in maintaining the circulation
in the cells. However, as the giant planets hold no such surface,
the mere possibility of them possessing meridional circulation cells
remained uncertain. Earth's midlatitudes are governed by the Ferrel
cells, which are driven by atmospheric turbulence, creating regions of eddy momentum flux convergence at midlatitudes [1]}.
These cells accompany the midlatitude jets and are connected to the
cloud structure in Earth's atmosphere.
